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Sánchez del Río, Manuel ; Boccaleri, Enrico ; Milanesio, Marco ; Croce, Gianluca ; Beek, Wouter van ; Tsiantos, Constantinos ; Chyssikos, Georgios D. ; Gionis, Vassilis ; Kacandes, Georges H. ; Súarez Barrios, Mercedes ; García Romero, Emilia | Springer Netherlands | 2009The heating process (30–200 ºC) of a palygorskite- indigo mixture has been monitored in situ and simultaneously by synchrotron powder diffraction and Raman spectroscopy. During this process, the dye and the clay interact to form Maya blue (MB), [...]texto impreso
Sánchez del Río, Manuel ; Súarez Barrios, Mercedes ; García Romero, Emilia ; Alianelli, Lucia ; Felici, Roberto ; Martinetto, Pauline ; Dooryhée, Eric ; Reyes Valerio, Constantino ; Borgatti, Francesco ; Doyle, Bryan ; Giglia, Angelo ; Mahne, Nicola ; Pedio, Maddalena ; Nannarone, Stefano | Elsevier | 2005We present a study of the Mg K-edge on sepiolite and palygorskite performed at the INFM BEAR beamline at Elettra synchrotron light source (Trieste). These two clays, although having very similar structures, show some different features in their [...]texto impreso
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Chryssikos, Georgios D. ; Gionis, Vassilis ; Kacandes, Georges H. ; Stathopoulou, Elizabeth T. ; Súarez Barrios, Mercedes ; García Romero, Emilia ; Sánchez del Río, Manuel | Mineralogical Society of America | 2009The OH speciation of 18 palygorskite samples from various localities were evaluated by near infrared spectroscopy (NIR) and compared to the corresponding octahedral composition derived from independent, single-particle analytical electron micros[...]texto impreso
García Rivas, Javier ; Súarez Barrios, Mercedes ; García Romero, Emilia ; Sánchez del Río, Manuel | Elsevier | 2020-09-15Palygorskite is a clay mineral whose structure has not been successfully deciphered, even considering the simultaneous presence of the orthorhombic and monoclinic phases within the same sample. An interesting question, which has barely been cons[...]texto impreso
Mondelli, C. ; Sánchez del Río, Manuel ; González González, Miguel Ángel ; Magazzú, Alessandro ; Cavallari, Chiara ; Súarez Barrios, Mercedes ; García Romero, Emilia ; Romano, P. | Institute of Physics Publishing | 2012The Maya blue (MB) is an artificial pigment created between 500-800 A.D. and used in murals, pottery and sculptures by Mayas and other people in Mesoamerica. MB is resistant to age, acid, weathering, biodegradation and even modern chemical solve[...]texto impreso
Súarez Barrios, Mercedes ; García Romero, Emilia ; Sánchez del Río, Manuel ; Martinetto, Pauline ; Dooryhée, Eric | Mineralogical Society | 2007High-resolution synchrotron X-ray diffraction recorded on a collection of palygorskites with different chemical compositions (obtained by analytical electron microscopy) permits unambiguous correlation of the crystallographic parameters a (or a [...]texto impreso
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The occurrence of palygorskite in the Yucatán peninsula: Ethno-historic and archaeological contexts.
Palygorskite is a rare clay mineral used by the ancient Mayas for fabricating the Maya blue pigment and for other purposes. It seems to have been obtained from a restricted area in the Yucatán peninsula where important archaeological sites are f[...]texto impreso
Stathopoulou, Elizabeth T. ; Súarez Barrios, Mercedes ; García Romero, Emilia ; Sánchez del Río, Manuel ; Kacandes, Georges H. ; Gionis, Vassilis ; Chryssikos, Georgios D. | Mineralogical Society of America. | 2011The mixed dioctahedral-trioctahedral character of Mg-rich palygorskite has been previously described by the formula yMg5 Si8 O20(OH)2(OH2)4(1–y)[xMg2Fe2(1–x)Mg2 Al2] Si8 O20(OH)2(OH2)4, where y is the trioctahedral fraction of this two-chain rib[...]texto impreso
Sánchez del Río, Manuel ; García Romero, Emilia ; Súarez Barrios, Mercedes ; Silva, Ivan da ; Fuentes Montero, Luis ; Martínez Criado, Gema | Mineralogical Society of America | 2011Twenty sepiolites of known composition from different origins were analyzed to quantify the variability in structural parameters and its possible relationships with composition and morphology. Morphology SEM analyses led to classify the sepiolit[...]
